<div th:fragment="myFirstPart" xmlns:th="http://www.w3.org/1999/xhtml">
    <p>will be include content one</p>
</div>
<div th:fragment="mySecondPart" xmlns:th="http://www.w3.org/1999/xhtml">
    <p>will be include content two</p>
</div>
<div th:fragment="myThreePart" xmlns:th="http://www.w3.org/1999/xhtml">
    <p>will be include content three</p>
</div>